Summer Session Registration is now open!

Summer Session Registration is now open! Columbia University students register through Vergil, Visiting Students apply now. Learn more.

Academic Calendar

2025

Session Dates
Term	Dates
Full Summer Term (X)	May 26–August 15 Classes begin on May 27 Make-up day for Memorial Day is May 30
Session A	May 26–July 4 Classes begin on May 27 Make-up day for Memorial Day is May 30
Session B	July 7–August 15
Session G	May 26–June 20 Classes begin on May 27 Make-up day for Memorial Day is May 30
Session J	June 23–July 18
Session H	June 9–July 4
Session R	July 7–August 1

Holidays and Special Dates
Holiday	Details
Memorial Day	No classes on May 26, University closed. Memorial Day Make-Up Day: May 30
Juneteenth	No classes on June 19, University closed. Juneteenth Make-Up Day: June 20
Independence Day	No classes on July 4, University closed. Independence Day Make-Up Day: N/A
Reading Day	Session A: June 27 (No classes) Session B/X: August 13 (No classes)
Final Exams	Exams held during normally scheduled class time. Session A: July 2 (M/W classes) and July 3 (T/R classes) Session B/X: August 14 (T/R classes) and August 15 (M/W classes)

Late Registration Dates
Late registration, which is the same for all students, takes place on the second, third, fourth, and fifth days of each session. For some courses, permission from the instructor may be required. A $50.00 fee will be charged during the late registration period. A $100.00 fee will be charged after the late registration period.
Term	Dates
Full Summer Term (X)	May 27–June 2
Session A	May 27–June 2
Session B	July 7–July 11
Session G	May 27–June 2
Session J	June 23–June 27
Session H	June 9–June 13
Session R	July 7–July 11

Add/Drop with Full Refund Deadlines
Term	Dates
Full Summer Term (X)	May 27–June 2
Session A	May 27–June 2
Session B	July 7–July 11

Last Day to Drop or Withdraw from an Individual Course or Change to Pass/Fail
Term	Date
Full Summer Term (X)	July 21
Session A	June 23
Session B	August 4

Columbia Student Course Registration Dates

Registration, add/drop, and withdrawal deadlines.

Visiting Student Admissions Deadlines

Application deadlines and program dates.

Visiting Student Course Registration Dates

Registration, add/drop, and withdrawal deadlines.